package com.sky.category.service.impl;

import com.baomidou.mybatisplus.core.metadata.OrderItem;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sky.category.mapper.CategoryMapper;
import com.sky.category.service.CategoryService;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dish.api.DishClient;
import com.sky.dish.mapper.DishMapper;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.result.PageResult;
import com.sky.setmeal.api.SetmealClient;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;


/**
 * 分类业务层
 */
@Service
@Slf4j
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
//    @Autowired
//    private DishMapper dishMapper;
//    @Autowired
//    private SetmealMapper setmealMapper;

    @Autowired
    private DishClient dishClient;

    @Autowired
    private SetmealClient setmealClient;

    /**
     * 新增分类
     * @param categoryDTO
     */
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        //属性拷贝
        BeanUtils.copyProperties(categoryDTO, category);

        //分类状态默认为禁用状态0
        category.setStatus(StatusConstant.DISABLE);

        //设置创建时间、修改时间、创建人、修改人
        category.setCreateTime(LocalDateTime.now());
        category.setUpdateTime(LocalDateTime.now());
        category.setCreateUser(BaseContext.getCurrentId());
        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.insertCategory(category);
    }

    /**
     * 分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        /*PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        //下一条sql进行分页，自动加入limit关键字分页
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);*/

        //构造分页条件
        Page<Category> page = Page.of(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        page.addOrder(OrderItem.asc("sort"));
        page.addOrder(OrderItem.desc("create_time"));
        Page<Category> employeePage = lambdaQuery()
                .like(categoryPageQueryDTO.getName() != null, Category::getName, categoryPageQueryDTO.getName())
                .eq(categoryPageQueryDTO.getType() != null, Category::getType, categoryPageQueryDTO.getType())
                .page(page);


        return new PageResult<>(employeePage.getTotal(), employeePage.getRecords());


//        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据id删除分类
     * @param id
     */
    public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
//        Integer count = dishMapper.countByCategoryId(id);
        Integer count = dishClient.contCategoryByid(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
//        count = setmealMapper.countByCategoryId(id);
        count = setmealClient.contSetmealByid(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        //删除分类数据
        categoryMapper.deleteById(id);
    }

    /**
     * 修改分类
     * @param categoryDTO
     */
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);

        //设置修改时间、修改人
        category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.updateCategory(category);

    }

    /**
     * 启用、禁用分类
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Category category = Category.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        categoryMapper.updateCategory(category);
    }

    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    public List<Category> list(Integer type) {
        return categoryMapper.listByType(type);
    }
}
